40 



# 

 Blount County^ 2 Miles North op Tidmoke. 



John W. Staab, 1905. (See Table, p. 39.) 



Alulatto, fine sandy loam, with reddish yellow subsoil. 



rhe rainfall was heavy. Apparently plot 1 Avas on richer 

 land than the other plots. The chief need was for nitrogen. 

 Phosphate and kainit were of little value. 



On the other hand, in a similar experiment made by Mr. 

 Staab the preceding year on apparently the same charac- 

 ter of land, the increase in yield of seed cotton per acre av- 

 eraged for cotton seed meal 215 pounds, for acid phosphat*; 

 282 pounds, and for kainit 77 pounds. 



Lbs. 



Average yield of seed cotton, unfertilized 190 



Increase of seed cotton when cotton seed meal was added: 



To unfertilized plot 



To acid phosphate plot 108 



To kainit plot 116 



To acid phosphate and kainit plot 155 



Avej'age increase with cotton seed meal 126 



Increase of seed cotton per acre when aeid phosphate was added: 



To unfertilized plot 80 



To cotton seed meal plot 



To kainit plot —37 



To cotton seed meal and kainit plot 2 



Average increase ivith acid phosphate 15 



Increase of seed cotton per acre when kainit was added: 



To unfertilized plot 70 



To cotton seed meal plot 



To acid phosphate plot — 47 



To cotton seed meal and acid phosphate plot 00 



Average increase with kainit 8 



